Air-pressure regulator for pneumatically-operating musical instruments.



J. GOURVILLE.

AIR PRESSURE REGULATOR FOR PNEUMATIGALLY OPERATING MUSICAL INSTRUMENTS. APPLIOATION FILED FEB. 10, 1906.

905,659. Patented Dec. 1, 1908.

K W F JOSEPH GOURVILLE, OF DETROIT, MICHIGAN, ASSIGNOR TO FARRAND ORGAN COMPANY.

UNITED OFFICE.

OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

AIR-PRESSURE REGULATOR FOR PNEUMATICALLY-OPERATING MUSICAL I INSTRUMENTS.

Application filed. February 10, 1906.

To all whom it may concern:

Be it known that I, J osnrn COURVILLE, a citizen of the United States of America, residing at Detroit, in the county of WVayne and State of Michigan, have invented certain new and useful Improvements in Air-Pressure Regulators for Pneumatically-Operating Mu sical Instruments, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to air pressure regulators of that type in which the connection between the regulated and unregulated air pressure passages is variably restricted by i a neumatically operated valve.

t is the object of the invention to simplify the construction and to this end the invention consists in certain novel features of construction as hereinafter set forth.

In the drawings, Figure 1 is a longitudinal section through the regulator and Fig. 2 is a plan, with the bellows removed.

A is a suitable casing containing a chamber B for the unregulated air and a chamber C for the regulated air.

D is the regulator pneumatic which is mounted on one side of the case and is connected to the chamber B through the port E and to the chamber 0 through the ort F, these ports being formed in the wall of the case.

H is a valve for closing the port E, which is operated by the collapsing of the pneumatic D. This valve is preferably formed of a curved strip of sheet metal, as shown, which is arranged so that when one end a is in contact with the wall G ad'acent to the port E, the opposite end I) wi extend outward, thereby providing free communication between the chamber B and the interior of the pneumatic and through the latter to the chamber C. When, however, the pneumatic D is collapsed, the projecting end of the valve II will be bent downward, so as to progressively restrict the port E until the latter is completely closed. This bending of the valve is effected through the medium of the pin or bearing I which is adjustably secured to the movable wall of the pneumatic.

J is a spring for holding the pneumatic D normally open.

WVith the construction as thus far described, when a partial vacuum is created in the chamber B, the pressure will be corre- Specification of Letters Patent.

Patented Dec. 1, 1908.

Serial No. 300,486.

spondingly reduced in the pneumatic D, causing the collapsing of said pneumatic until the valve H closes or greatly restricts the port E. The pressure of the air in the pneumatic D and the chamber C is deter mined by the tension of the spring J and is maintained substantially constant, regardless of Variations in pressure in the chamber B, so long as the latter is of higher vacuum.

It is usual to provide regulators of this type with a bypass connecting the chambers for the regulated and unregulated air pres sures and to control this by-pass by a valve, which is separate and distinct from the valve automatically operated by the regulator. I11

the present construction, I have dispensed with this by-pass connection and the separate valve and have accomplished the same purpose by providing a separate controlling means for the automatically operated valve II. This controlling connection is such that the valve H may be moved to open the port E when the pneumatic D is collapsed and without the necessity of overcoming the pressure of the latter.

J is a rockable member to which the valve II is connected at the end a thereof. This member is pivoted, as in the bearings K, so that when rocked, the end a of the valve will be lifted from the seat and the opposite end I) will be simultaneously lowered, or, where the pneumatic D is collapsed and the end I) is depressed thereby, the valve may still be opened by the rocking of the member J.

L is a rod or other connection to the mem ber J for rocking the same.

By the arrangement just described, the valve H may be moved at any time to open the port E and provide an unrestricted connection between the chambers B C. This 0 eration does not in any way interfere with t e operation of the pneumatic D and is accomplished without overcoming the resistance of said pneumatic when in collapsed position. The only resistance that is encountered is in closing the valve H by the connection L and in overcoming the slight tension of the spring J.

What I claim as my invention is,

1. The combination with an air conduit, of l means for independently controlling said valve.

2. The combination with a conduit, of a valve for variably restricting said conduit, a

pneumatic motor for automatically operating said valve and operated by the air pressure in said conduit on one side of said valve, and independent means controlling said valve without interfering with the operation of said motor.

3. The combination with an air conduit, of a valve for variably restricting said conduit, a pneumatic motor for automatically operating said valve, operated by the air pressure in said conduit on one side of said valve, and

independent means for opening said valve without interference with the operation of said motor.

4. The combination with a casing having separate chambers therein for different air pressures, of a valve controlling a connecting passage between said chambers, a collapsible bellowsin constant communication with one of said chambers for automatically actuating said valve, to close said passage, and independent means for opening said valve without interference with the operation of said collapsible bellows.

5. An air pressure regulator comprising a collapsible bellows, a valve controlling a port communicating with said bellows, and automatically operating at one end by the collapsing thereof to close the port, and independent means for operating the opposite end of said valve to open the port.

6. An air pressure regulator comprising a collapsible bellows having an air inlet port, a curved resilient plate arranged within said bellows and having one end thereof operated by the collapsing of the bellows to close said port, and independent means for operating the opposite end of said plate to open the port.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH COURVILLE.

Witnesses JAMEs P. BARRY, EDWARD P. AULT. 

